			ORG 00H
START:			JB P1.4,NEXT1
			CLR P1.0
			SJMP NEX1
NEXT1:			SETB P1.0
NEX1:			JB P1.5,NEXT2
			CLR P1.1
			SJMP NEX2
NEXT2:			SETB P1.1
NEX2:			JB P1.6,NEXT3
			CLR P1.2
			SJMP NEX3
NEXT3:			SETB P1.2
NEX3:			JB P1.7,NEXT4
			CLR P1.3
			SJMP NEX4
NEXT4:			SETB P1.3
NEX4:			SJMP START
			END
